package cn.edu.hitwh.resume.web.interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.ui.ModelMap;
import org.springframework.util.StringUtils;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

public class DefaultUrlInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
                             Object handler) throws Exception {
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
                           ModelAndView modelAndView) throws Exception {
        if (null == modelAndView) {
            return;
        }
        ModelMap modelMap = modelAndView.getModelMap();
        modelMap.put("contextPath", findContextPath(request));
        
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response,
                                Object handler, Exception ex) throws Exception {
    }

    
    private static String findContextPath(HttpServletRequest request) {
        String contextPath = request.getContextPath();

        if (StringUtils.endsWithIgnoreCase(contextPath, "/")) {
            contextPath = contextPath.substring(0, contextPath.length() - 1);
        }
        return contextPath;
    }
 
}